JPS62297453A - Preheating method in plasma carburizing furnace - Google Patents
Preheating method in plasma carburizing furnaceInfo
- Publication number
- JPS62297453A JPS62297453A JP14098086A JP14098086A JPS62297453A JP S62297453 A JPS62297453 A JP S62297453A JP 14098086 A JP14098086 A JP 14098086A JP 14098086 A JP14098086 A JP 14098086A JP S62297453 A JPS62297453 A JP S62297453A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- coil
- rotating magnetic
- carburizing furnace
- coils
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005255 carburizing Methods 0.000 title claims description 10
- 238000000034 method Methods 0.000 title claims description 9
- 230000006698 induction Effects 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
Description
【発明の詳細な説明】
ろ、 発明の詳細な説明
〔産業上の利用分野〕
この発明は、プラズマ浸炭炉における予備加熱方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION Detailed Description of the Invention [Field of Industrial Application] This invention relates to a preheating method in a plasma carburizing furnace.
プラズマ浸炭を行う場合、対象物を処理湿度まで加熱す
る必要がある。When performing plasma carburization, it is necessary to heat the object to the processing humidity.
従来の加熱法としては、放電、補助陰極及び高周波によ
るものが用いられている。この内、放電によるものは小
物のみに有効であシ、補助陰極を用いろものでは対象物
の型に合わせて陰極を作る必要があシ、牙１図（ａ）に
示したようにコイル１，１′で対象物４に交・番磁界を
かけると第１図（ｂ）のように誘導電流が流れて対象物
４の側面のみが加熱される。Conventional heating methods include electrical discharge, auxiliary cathode, and radio frequency. Among these, those using electric discharge are effective only for small objects, and those using an auxiliary cathode require making the cathode to match the shape of the object. , 1', when an alternating magnetic field is applied to the object 4, an induced current flows as shown in FIG. 1(b), and only the side surface of the object 4 is heated.
特に、対象物が金型のような場合には全表面のみを均一
に加熱する必要があるが、これに対応でき得る技術はな
かった。In particular, when the object is a mold, it is necessary to uniformly heat only the entire surface, but there is no technology that can handle this.
そこで、この発明は前記のような従来技術の不都合な点
を改善して対象物の表面を均一に加熱することのできる
プラズマ浸炭炉における予備加熱方法を提供することを
目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a preheating method in a plasma carburizing furnace that can improve the disadvantages of the prior art as described above and uniformly heat the surface of an object.
この発明によるプラズマ浸炭炉における予備加熱方法は
交番磁界と回転磁界の両方を重畳して被処理物を誘導加
熱する点に特徴がある。The preheating method in a plasma carburizing furnace according to the present invention is characterized in that the workpiece is heated by induction by superimposing both an alternating magnetic field and a rotating magnetic field.
以下、図示するこの発明の実施例により説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below with reference to illustrated embodiments.
牙２図（ａ） 、 （ｂ）にこの発明を実施するための
装置平面図及び縦断面図を示し１こ。ここで、球状の対
象物４は周方向及び上下方向の６面をコイル１，１′、
２．２′、３．３′で取シ囲まれている。Figures 2(a) and 2(b) show a plan view and a longitudinal sectional view of an apparatus for carrying out the present invention. Here, the spherical object 4 has six sides in the circumferential direction and the vertical direction with coils 1, 1',
It is surrounded by 2.2' and 3.3'.
ここで、コイル１とコイル１′、コイル２とコイル２及
びコイル３とコイル３′とは各々並列に接続されている
。この中で、コイル１．コイル１′とコイル２．コイル
２′とに位相が９０°異なった２相交流を接続し回転磁
界を発生させる。Here, the coil 1 and the coil 1', the coil 2 and the coil 2, and the coil 3 and the coil 3' are each connected in parallel. Among these, coil 1. Coil 1' and coil 2. A two-phase alternating current having a phase difference of 90 degrees is connected to the coil 2' to generate a rotating magnetic field.
コイル３．コイルぎにはコイル１．コイル１′とは異な
った周波数（周波数比が簡単な整数比には、ならない方
が良い）を接続し、回転磁界に上下方向の成分を与える
。Coil 3. Coil 1. A frequency different from that of the coil 1' (it is better that the frequency ratio is not a simple integer ratio) is connected to give a vertical component to the rotating magnetic field.
以上の構成において、回転磁界を加えた場合の対象物４
に誘起される電流を牙６図（ａｌ 、 （ｂｌに示した
。つまり、コイル１．コイル１′及びコイル２．コイル
２により回転磁界を加えると、牙３図に示すように誘導
電流は対象物４表面を上下に流れ、かつ北極・南極方向
を軸に回転していく。In the above configuration, the object 4 when a rotating magnetic field is applied
The induced current is shown in Fig. 6 (al, bl).In other words, when a rotating magnetic field is applied by coil 1.coil 1' and coil 2.coil 2, the induced current becomes symmetrical as shown in Fig. 3. Object 4 Flows up and down on the surface and rotates around the north and south poles.
この状態において、コイル３．コイルぎにより上下方向
の交番磁界を重畳させると誘導電流は牙４図（ａ） 、
（ｂ）のようになシ、対象物４の全表面をむらなく均
一に流れる。In this state, coil 3. When an alternating magnetic field in the vertical direction is superimposed by a coil, the induced current is as shown in Figure 4 (a).
As shown in (b), the water flows evenly and uniformly over the entire surface of the object 4.
このように、対象物４の表面を均一に加熱しながらプラ
ズマ浸炭することにより均一な浸炭をすることができる
。In this way, uniform carburization can be performed by plasma carburizing while uniformly heating the surface of the object 4.
この実施例では、プラズマ浸炭炉における利用について
記載したがプラズマ窒化、高周波熱処理の加熱方法、ま
たは高周波溶解等にも利用できる。 −
〔発明の効果〕
この発明によるプラズマ浸炭炉における予備加熱方法の
実施例は以上の通りであり、次に述べる効果を挙げるこ
とができる。Although this embodiment describes the use in a plasma carburizing furnace, it can also be used in plasma nitriding, a heating method for high-frequency heat treatment, high-frequency melting, etc. - [Effects of the Invention] The embodiments of the preheating method in a plasma carburizing furnace according to the present invention are as described above, and the following effects can be achieved.
交番磁界と回転磁界とな重畳することにより対象物の表
面を均一に加熱することの出来るプラズマ浸炭炉におけ
る予備加熱方法となる。This is a preheating method in a plasma carburizing furnace that can uniformly heat the surface of an object by superimposing an alternating magnetic field and a rotating magnetic field.
２１図（ａ） 、 （ｂ）は従来例の構成を示す概略図
、牙２図（ａ） 、 ｔｂ）は実施例の平面図及び縦断
面図、牙３図（ａ） 、 （ｂ）は実施例の回転磁界に
よる誘導電流図、牙４図（ａｌ 、 （ｂｌは回転磁界
と交番磁界を重畳させた誘導電流図である。
１ 、１’ 、 ２ 、２’ 、 ３ 、３’・・・・
・・コイル４・・・・・・対象物。Figures 21 (a) and 21 (b) are schematic diagrams showing the configuration of the conventional example, Figures 2 (a) and tb) are plan views and vertical sectional views of the embodiment, and Figures 3 (a) and (b) are Induced current diagram due to the rotating magnetic field of the example, Figure 4 (al, (bl) is an induced current diagram in which the rotating magnetic field and the alternating magnetic field are superimposed. 1, 1', 2, 2', 3, 3'...・・・
...Coil 4...Target.
Claims (1)
熱することを特徴とするプラズマ浸炭炉における予備加
熱方法。[Scope of Claim] A preheating method in a plasma carburizing furnace, characterized in that in the plasma carburizing furnace, both an alternating magnetic field and a rotating magnetic field are superimposed to heat a workpiece by induction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14098086A JPS62297453A (en) | 1986-06-17 | 1986-06-17 | Preheating method in plasma carburizing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14098086A JPS62297453A (en) | 1986-06-17 | 1986-06-17 | Preheating method in plasma carburizing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62297453A true JPS62297453A (en) | 1987-12-24 |
Family
ID=15281327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14098086A Pending JPS62297453A (en) | 1986-06-17 | 1986-06-17 | Preheating method in plasma carburizing furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62297453A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1053809A (en) * | 1996-06-06 | 1998-02-24 | Dowa Mining Co Ltd | Carburize quenching and tempering method and device thereof |
-
1986
- 1986-06-17 JP JP14098086A patent/JPS62297453A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1053809A (en) * | 1996-06-06 | 1998-02-24 | Dowa Mining Co Ltd | Carburize quenching and tempering method and device thereof |
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